Method of forming foundation piles



. July 14, 1936. E. D. WATT 2,047,344

METHOD OF FORMING FOUNDATION PILES Filed March 9, 1935 2 Shees-Sheet l FIGA.

NVENTOR IHU D. WATT ATTORNEY July 14, 1936. E. D. wATT 2,047,344

HMETHOD OF- FORMING FOUNDATION PILES Filed March 9, 1935 2 Sheets-Sheet 2v ATTORNEY I .a n. l .n I s. l l. s

Patented July 14, 1936 UNITED STATES PATENT OFFICE 2.047.344 v METHOD OF FORMTNG FOUNDATION PILES Elihu D. Watt, Plainfield, N. J., assignor to Raymond Concrete Pile Company, New York, N. Y., a corporation of New Jersey Application March 9, 1935, Serial No. 10,132

2 Claims. (Cl. (i1-.57)

This invention pertains to a method of forming foundation piles, each pile comprising a steel beam, or the like, with its upper end encased in concrete. The beam may be a structural shape,

or tubular, or may even be of wood, and plastic material such as asphalt or tar may be used in place of concrete.

The method herein disclosed has the advantage of low cost and convenience, since the whole operation is performed right on the job, no special apparatus being required.

This method also has the advantage of improving the quality of the concrete, its density being increased by the vibratory effect of the beam during driving and by compression due to displacement by the beam passing through it, vibration and compression being well-known means of increasing density. 'I'hus the protective properties of the concrete are increased.

Further and other objects and advantages will be apparent from the specification and claims, and from the accompanying drawings which illustrate what is now considered the preferred embodiment of the invention.

In the drawings:

Fig. 1 shows a hole bored in the ground to serve as a. mold for the plastic material.

Fig. 2 shows the hole of Fig. 1 lled with plastic material.

Fig. 3 shows the finished pile, a steel beam having been driven through the plastic mass to footmg.

Fig. 4 is a plan view of. Fig. 3.

Fig. 5 shows the first step of the method when the ground is of such nature as to require a lining in the mold to prevent collapse of the walls of the mold.

Fig. 6 shows the casing of Fig. 5 lled with plastic material after removal of the driving core.

Fig. 7 shows the steel beam, casing and plastic material after driving of the beam.

Fig. 8 shows the iinished structure, the casing having been removed.

In Fig. 1, I0 designates a hole bored by an auger or otherwise in ground l2 which is rm enough so that the Wall of the hole is self-sustaining. Fig. 2 shows hole (mold) l0 filled with plastic material, usually concrete, I4, and Fig. 3 shows the finished structure, the beam I6 having been concrete as before (Fig. 3).

forced downwardly through mass I4 to rock or other footing I 8. after which, if the material is concreteit is allowed to set.- If water rises in the hole (Fig. 1) the concrete (Fig. 2) may be placed by tremie luntil above water level. 6

If the ground is not self-sustaining the mold l0 may be formed by sinking into'the ground a casing 20 mounted on a drive core 22 (Fig. 5). After the core is removed casing 20 is lled with plastic concrete 24 (Fig. 6) after which casing 20 10 isremoved and beam .I6 is driven through the If the soil be watery, casing 20 may be provided with a boot at its lower end and after sealing with concrete the beam may be driven. 15 Of course various modifications of the above method will occur to those skilled in the art. For instance, as in Figs. 6 and '1, the beam may be driven before casing 20 is removed, or while the mold is only partly filled with concrete, the bal- 20 ance of the concrete being poured after the driving, or casing 20 may be withdrawn during or -after the concrete pouring operation, thus forming the condition of Fig. 2, after which the beam is driven as in Fig. 3. Also in the hole of Fig. 1, 25 a permanent shell as indicated by dotted lines 26 may be used to keep the concrete out of contact with the ground. The beam may even be encased throughout its length.

It is to be understood that the invention is not 30 limited to the specific embodiment herein illustrated and described butmay be=used in other ways without departure from its spirit as defined by the following claims.

I claim: I 35 1. In the method of forming a pile, the steps Of providing a mass of plastic concrete, forcing a beam lengthwise through said mass until a portion of said beam projects below said mass and letting said concrete set around said beam. 40

ELIHU D. WATT. 

